1 #include "region.h"
2 #include "utils.h"
3 
4 #include "shape.h"
5 
6 namespace Geom {
7 
operator *(Matrix const & m) const8 Region Region::operator*(Matrix const &m) const {
9     Region r((m.flips() ? boundary.reverse() : boundary) * m, fill);
10     if(box && m.onlyScaleAndTranslation()) r.box = (*box) * m;
11     return r;
12 }
13 
invariants() const14 bool Region::invariants() const {
15     return self_crossings(boundary).empty();
16 }
17 
outer_index(Regions const & ps)18 unsigned outer_index(Regions const &ps) {
19     if(ps.size() <= 1 || ps[0].contains(ps[1])) {
20         return 0;
21     } else {
22         /* Since we've already shown that chunks[0] is not outside
23            it can be used as an exemplar inner. */
24         Point exemplar = Path(ps[0]).initialPoint();
25         for(unsigned i = 1; i < ps.size(); i++) {
26             if(ps[i].contains(exemplar)) {
27                 return i;
28             }
29         }
30     }
31     return ps.size();
32 }
33 
34 }
35